Tack or nail



C. K. HILL.

TACK OR NAIL.

APPLICATION FILED JAN. 6, 1919.

Patented mu 23,1919.

orinon GHARLES 1K. HILL, F CJLEVEIQAND, OHIO, ASSIQNOR TOTHE-I-I. C. TACKflOMPA N'Y, 01E ULEVELAND, OHIO, A. CORPORATION 011' OHIO. Y

TACK 0R NAIL.

t eater.

State of Ohio, have invented a new anduseful Tmprovement in Tacks or Nails, of which the following is a specification, the principle of the invention being herein eX- plained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The present improved tack and nail is more especially designed for cobblers use in attaching rubber or composition soles to shoes and the like. It has heretofore been found impossible in practice to satisfactorily attach this type of sole by means of ordinary shoe-makers nails or brads, for the reason that the material will stretch enough around the aperture made by the shank to slip over the head unless the latter be unduly large. It is of course not feasible to employ a nail with a large flat head, so that soles of the kind in question have been generally stitched or sewn fast, which is a more expensive proposition and has militated to an extent against the adoption of rubber or composition soles for general use. The object of the present invention, accordingly, is to provide a form of head that will rmly grip a material such as a rubber or composition sole without it being necessary that such head be much, if any, larger than IBM those ordinarily used in tapping leather soles. At the same time the design ,of the head is such as to present a neat and ornamental appearance when applied.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims, the annexed drawing and the following description setting forth in detail certain mechanism embodying the invention, such disclosed. means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing Figure 1 is a side elevational view of a tack or nail on a somewhat enlarged scale embodying my present improved construction, Fig. 2 is a front elevation of the same;

Specification of Letters Patent.

Patented Dec. 23, 1919.

Application filed January 6, 1919. Serial Nb. aeam.

Fig. 3 is a plan of the head; Fig. 4: similarly shows in plan the heads of aseries of the halls as appl ed; and Fig. 5 is a transverse sectlon showing the method of application,

the plane of the section being indicatedby the line 5-5, Fig. 4. I Y The shank 1 of my improved nail or tack 1s of familiar form, being similar to that found in the ordinary shoe-makers nail, so

need not be specifically described. The head 2, however, to which attention is more particularly directed, is of transversely elongated shape, i. 6. while only a trifle wider than "the shank in one direction, it is approxlmately twice as wide as such shank in the other, each of its ends being formed with a downwardly bent tooth or prong 3. The under face of the head is substantially flat save for such prongs, while the sides of the head are beveled inwardly toward the top. Said head is furthermore formed with a depression or notch l, the side walls of which incline at an angle approximately parallel with the non-adjacent faces of the head so as to form in effect a double head, as clearly shown in Figs.- 1 and 5.

In applying nails or tacks of the improved construction ust described, as for example in attaching an' outer sole 6 of rubber or composition to the sole 7 of a shoe, the nails are driven into such first-named layer until the outer faces of the heads are substantially flush with the surface of such layer as shown in Fig. 5, successive nails being disposed with their heads 2 substantially in alinement, as shown in Fig. 4:. The result is that the heads present the appearance of stitching, due to the notches 4 therein, while the downwardly depending teeth or prongs 3 grip the material on each side of the shank so as to firmly anchor the head in the material of the layer 6 and prevent the latter from slipping past such head. llt will be understood that in the manufacturing operation the formation of the teeth or prongs 3' ments stated by any of the following claims or the equivalent of such stated elements be emplo ed.

I therefore particularly point out and distinctly claim as my invention 1. As a new article of manufacture, a tack or nail comprising a shank, and a transversely elongated head formed with a downwardly bent tooth or prong at each end and with a depression or notch intermediately of such ends, the under face of said head being substantially flat.

2. As a new article of manufacture, a tack or nail comprising a shank, and a transversely elongated head formed with a downwardly bent tooth or prong at each end and with a depression or notch intermediately of such ends, the under face of said head being substantially flat and the'sides thereof being beveled inwardly toward the top.

l9figned by me, this 31 day of December,

' CHARLES K. HILL. 

